remove inclusion guard hacks for sys/kd.h

maintainer's note: at some point, probably long before linux separated
the uapi headers, it was the case, or at least I believed it was the
case, that linux/types.h was unsafe to include from userspace. thus,
the inclusion guard macro _LINUX_TYPES_H was defined in sys/kd.h to
prevent linux/kd.h from including linux/types.h (which it spuriously
includes but does not use). as far as I can tell, whatever problem
this was meant to solve does not seem to have been present for a long
time, and the hack was not done correctly anyway, so removing it is
the right thing to do.

diff --git a/include/sys/kd.h b/include/sys/kd.h
index 793fd59fe38ed33f527edecd19f4a27b692d9745..33b873f49c2615e9b5dc0130b290bee2968b3cd4 100644 (file)
--- a/include/sys/kd.h
+++ b/include/sys/kd.h
@@ -1,8 +1 @@
-#ifndef _SYS_KD_H
-#define _SYS_KD_H
-
-#define _LINUX_TYPES_H
 #include <linux/kd.h>
-#undef _LINUX_TYPES_H
-
-#endif